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<li class="navelem"><a class="el" href="../../d2/d75/namespacecv.html">cv</a></li><li class="navelem"><a class="el" href="../../d0/d21/classcv_1_1ConjGradSolver.html">ConjGradSolver</a></li>  </ul>
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<a href="#pub-static-methods">Static Public Member Functions</a> &#124;
<a href="../../d7/de6/classcv_1_1ConjGradSolver-members.html">List of all members</a>  </div>
  <div class="headertitle">
<div class="title">cv::ConjGradSolver Class Reference<div class="ingroups"><a class="el" href="../../d0/de1/group__core.html">Core functionality</a> &raquo; <a class="el" href="../../da/d01/group__core__optim.html">Optimization Algorithms</a></div></div>  </div>
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<p>This class is used to perform the non-linear non-constrained minimization of a function with known gradient,.  
 <a href="../../d0/d21/classcv_1_1ConjGradSolver.html#details">More...</a></p>

<p><code>#include &lt;opencv2/core/optim.hpp&gt;</code></p>
<div class="dynheader">
Inheritance diagram for cv::ConjGradSolver:</div>
<div class="dyncontent">
 <div class="center">
  <img src="../../d0/d21/classcv_1_1ConjGradSolver.png" usemap="#cv::ConjGradSolver_map" alt=""/>
  <map id="cv::ConjGradSolver_map" name="cv::ConjGradSolver_map">
<area href="../../df/d11/classcv_1_1MinProblemSolver.html" title="Basic interface for all solvers. " alt="cv::MinProblemSolver" shape="rect" coords="0,56,136,80"/>
<area href="../../d3/d46/classcv_1_1Algorithm.html" title="This is a base class for all more or less complex algorithms in OpenCV. " alt="cv::Algorithm" shape="rect" coords="0,0,136,24"/>
</map>
 </div></div>
<table class="memberdecls">
<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="pub-static-methods"></a>
Static Public Member Functions</h2></td></tr>
<tr class="memitem:ad64e8d003cc3a6682b4fa7ab18c0c0e9"><td class="memItemLeft" align="right" valign="top">static <a class="el" href="../../dc/d84/group__core__basic.html#ga6395ca871a678020c4a31fadf7e8cc63">Ptr</a>&lt; <a class="el" href="../../d0/d21/classcv_1_1ConjGradSolver.html">ConjGradSolver</a> &gt;&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="../../d0/d21/classcv_1_1ConjGradSolver.html#ad64e8d003cc3a6682b4fa7ab18c0c0e9">create</a> (const <a class="el" href="../../dc/d84/group__core__basic.html#ga6395ca871a678020c4a31fadf7e8cc63">Ptr</a>&lt; <a class="el" href="../../da/d62/classcv_1_1MinProblemSolver_1_1Function.html">MinProblemSolver::Function</a> &gt; &amp;f=<a class="el" href="../../dc/d84/group__core__basic.html#ga6395ca871a678020c4a31fadf7e8cc63">Ptr</a>&lt; <a class="el" href="../../da/d62/classcv_1_1MinProblemSolver_1_1Function.html">ConjGradSolver::Function</a> &gt;(), <a class="el" href="../../d9/d5d/classcv_1_1TermCriteria.html">TermCriteria</a> termcrit=<a class="el" href="../../d9/d5d/classcv_1_1TermCriteria.html">TermCriteria</a>(<a class="el" href="../../d9/d5d/classcv_1_1TermCriteria.html#a56fecdc291ccaba8aad27d67ccf72c57a56ca2bc5cd06345060a1c1c66a8fc06e">TermCriteria::MAX_ITER</a>+<a class="el" href="../../d9/d5d/classcv_1_1TermCriteria.html#a56fecdc291ccaba8aad27d67ccf72c57a857609e73e7028e638d2ea649f3b45d5">TermCriteria::EPS</a>, 5000, 0.000001))</td></tr>
<tr class="memdesc:ad64e8d003cc3a6682b4fa7ab18c0c0e9"><td class="mdescLeft">&#160;</td><td class="mdescRight">This function returns the reference to the ready-to-use <a class="el" href="../../d0/d21/classcv_1_1ConjGradSolver.html" title="This class is used to perform the non-linear non-constrained minimization of a function with known gr...">ConjGradSolver</a> object.  <a href="#ad64e8d003cc3a6682b4fa7ab18c0c0e9">More...</a><br /></td></tr>
<tr class="separator:ad64e8d003cc3a6682b4fa7ab18c0c0e9"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="inherit_header pub_static_methods_classcv_1_1Algorithm"><td colspan="2" onclick="javascript:toggleInherit('pub_static_methods_classcv_1_1Algorithm')"><img src="../../closed.png" alt="-"/>&#160;Static Public Member Functions inherited from <a class="el" href="../../d3/d46/classcv_1_1Algorithm.html">cv::Algorithm</a></td></tr>
<tr class="memitem:a623841c33b58ea9c4847da04607e067b inherit pub_static_methods_classcv_1_1Algorithm"><td class="memTemplParams" colspan="2">template&lt;typename _Tp &gt; </td></tr>
<tr class="memitem:a623841c33b58ea9c4847da04607e067b inherit pub_static_methods_classcv_1_1Algorithm"><td class="memTemplItemLeft" align="right" valign="top">static <a class="el" href="../../dc/d84/group__core__basic.html#ga6395ca871a678020c4a31fadf7e8cc63">Ptr</a>&lt; _Tp &gt;&#160;</td><td class="memTemplItemRight" valign="bottom"><a class="el" href="../../d3/d46/classcv_1_1Algorithm.html#a623841c33b58ea9c4847da04607e067b">load</a> (const <a class="el" href="../../dc/d84/group__core__basic.html#ga1f6634802eeadfd7245bc75cf3e216c2">String</a> &amp;filename, const <a class="el" href="../../dc/d84/group__core__basic.html#ga1f6634802eeadfd7245bc75cf3e216c2">String</a> &amp;objname=<a class="el" href="../../dc/d84/group__core__basic.html#ga1f6634802eeadfd7245bc75cf3e216c2">String</a>())</td></tr>
<tr class="memdesc:a623841c33b58ea9c4847da04607e067b inherit pub_static_methods_classcv_1_1Algorithm"><td class="mdescLeft">&#160;</td><td class="mdescRight">Loads algorithm from the file.  <a href="../../d3/d46/classcv_1_1Algorithm.html#a623841c33b58ea9c4847da04607e067b">More...</a><br /></td></tr>
<tr class="separator:a623841c33b58ea9c4847da04607e067b inherit pub_static_methods_classcv_1_1Algorithm"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a3ba305a10d02479c13cf7d169c321547 inherit pub_static_methods_classcv_1_1Algorithm"><td class="memTemplParams" colspan="2">template&lt;typename _Tp &gt; </td></tr>
<tr class="memitem:a3ba305a10d02479c13cf7d169c321547 inherit pub_static_methods_classcv_1_1Algorithm"><td class="memTemplItemLeft" align="right" valign="top">static <a class="el" href="../../dc/d84/group__core__basic.html#ga6395ca871a678020c4a31fadf7e8cc63">Ptr</a>&lt; _Tp &gt;&#160;</td><td class="memTemplItemRight" valign="bottom"><a class="el" href="../../d3/d46/classcv_1_1Algorithm.html#a3ba305a10d02479c13cf7d169c321547">loadFromString</a> (const <a class="el" href="../../dc/d84/group__core__basic.html#ga1f6634802eeadfd7245bc75cf3e216c2">String</a> &amp;strModel, const <a class="el" href="../../dc/d84/group__core__basic.html#ga1f6634802eeadfd7245bc75cf3e216c2">String</a> &amp;objname=<a class="el" href="../../dc/d84/group__core__basic.html#ga1f6634802eeadfd7245bc75cf3e216c2">String</a>())</td></tr>
<tr class="memdesc:a3ba305a10d02479c13cf7d169c321547 inherit pub_static_methods_classcv_1_1Algorithm"><td class="mdescLeft">&#160;</td><td class="mdescRight">Loads algorithm from a String.  <a href="../../d3/d46/classcv_1_1Algorithm.html#a3ba305a10d02479c13cf7d169c321547">More...</a><br /></td></tr>
<tr class="separator:a3ba305a10d02479c13cf7d169c321547 inherit pub_static_methods_classcv_1_1Algorithm"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:ad8c591bacb34c485f5b7a250c314fc53 inherit pub_static_methods_classcv_1_1Algorithm"><td class="memTemplParams" colspan="2">template&lt;typename _Tp &gt; </td></tr>
<tr class="memitem:ad8c591bacb34c485f5b7a250c314fc53 inherit pub_static_methods_classcv_1_1Algorithm"><td class="memTemplItemLeft" align="right" valign="top">static <a class="el" href="../../dc/d84/group__core__basic.html#ga6395ca871a678020c4a31fadf7e8cc63">Ptr</a>&lt; _Tp &gt;&#160;</td><td class="memTemplItemRight" valign="bottom"><a class="el" href="../../d3/d46/classcv_1_1Algorithm.html#ad8c591bacb34c485f5b7a250c314fc53">read</a> (const <a class="el" href="../../de/dd9/classcv_1_1FileNode.html">FileNode</a> &amp;fn)</td></tr>
<tr class="memdesc:ad8c591bacb34c485f5b7a250c314fc53 inherit pub_static_methods_classcv_1_1Algorithm"><td class="mdescLeft">&#160;</td><td class="mdescRight">Reads algorithm from the file node.  <a href="../../d3/d46/classcv_1_1Algorithm.html#ad8c591bacb34c485f5b7a250c314fc53">More...</a><br /></td></tr>
<tr class="separator:ad8c591bacb34c485f5b7a250c314fc53 inherit pub_static_methods_classcv_1_1Algorithm"><td class="memSeparator" colspan="2">&#160;</td></tr>
</table><table class="memberdecls">
<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="inherited"></a>
Additional Inherited Members</h2></td></tr>
<tr class="inherit_header pub_methods_classcv_1_1MinProblemSolver"><td colspan="2" onclick="javascript:toggleInherit('pub_methods_classcv_1_1MinProblemSolver')"><img src="../../closed.png" alt="-"/>&#160;Public Member Functions inherited from <a class="el" href="../../df/d11/classcv_1_1MinProblemSolver.html">cv::MinProblemSolver</a></td></tr>
<tr class="memitem:aa21b828e74653fb760f021c27d1f498a inherit pub_methods_classcv_1_1MinProblemSolver"><td class="memItemLeft" align="right" valign="top">virtual <a class="el" href="../../dc/d84/group__core__basic.html#ga6395ca871a678020c4a31fadf7e8cc63">Ptr</a>&lt; <a class="el" href="../../da/d62/classcv_1_1MinProblemSolver_1_1Function.html">Function</a> &gt;&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="../../df/d11/classcv_1_1MinProblemSolver.html#aa21b828e74653fb760f021c27d1f498a">getFunction</a> () const =0</td></tr>
<tr class="memdesc:aa21b828e74653fb760f021c27d1f498a inherit pub_methods_classcv_1_1MinProblemSolver"><td class="mdescLeft">&#160;</td><td class="mdescRight">Getter for the optimized function.  <a href="../../df/d11/classcv_1_1MinProblemSolver.html#aa21b828e74653fb760f021c27d1f498a">More...</a><br /></td></tr>
<tr class="separator:aa21b828e74653fb760f021c27d1f498a inherit pub_methods_classcv_1_1MinProblemSolver"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:aacdc1d10d144990d0aad163f0239efb4 inherit pub_methods_classcv_1_1MinProblemSolver"><td class="memItemLeft" align="right" valign="top">virtual <a class="el" href="../../d9/d5d/classcv_1_1TermCriteria.html">TermCriteria</a>&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="../../df/d11/classcv_1_1MinProblemSolver.html#aacdc1d10d144990d0aad163f0239efb4">getTermCriteria</a> () const =0</td></tr>
<tr class="memdesc:aacdc1d10d144990d0aad163f0239efb4 inherit pub_methods_classcv_1_1MinProblemSolver"><td class="mdescLeft">&#160;</td><td class="mdescRight">Getter for the previously set terminal criteria for this algorithm.  <a href="../../df/d11/classcv_1_1MinProblemSolver.html#aacdc1d10d144990d0aad163f0239efb4">More...</a><br /></td></tr>
<tr class="separator:aacdc1d10d144990d0aad163f0239efb4 inherit pub_methods_classcv_1_1MinProblemSolver"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:ade85ab8dceca1ee4974f62b758fa90af inherit pub_methods_classcv_1_1MinProblemSolver"><td class="memItemLeft" align="right" valign="top">virtual double&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="../../df/d11/classcv_1_1MinProblemSolver.html#ade85ab8dceca1ee4974f62b758fa90af">minimize</a> (<a class="el" href="../../dc/d84/group__core__basic.html#gaf77c9a14ef956c50c1efd4547f444e63">InputOutputArray</a> x)=0</td></tr>
<tr class="memdesc:ade85ab8dceca1ee4974f62b758fa90af inherit pub_methods_classcv_1_1MinProblemSolver"><td class="mdescLeft">&#160;</td><td class="mdescRight">actually runs the algorithm and performs the minimization.  <a href="../../df/d11/classcv_1_1MinProblemSolver.html#ade85ab8dceca1ee4974f62b758fa90af">More...</a><br /></td></tr>
<tr class="separator:ade85ab8dceca1ee4974f62b758fa90af inherit pub_methods_classcv_1_1MinProblemSolver"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a22632a6392d2e159a8e01c2ed697cbe0 inherit pub_methods_classcv_1_1MinProblemSolver"><td class="memItemLeft" align="right" valign="top">virtual void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="../../df/d11/classcv_1_1MinProblemSolver.html#a22632a6392d2e159a8e01c2ed697cbe0">setFunction</a> (const <a class="el" href="../../dc/d84/group__core__basic.html#ga6395ca871a678020c4a31fadf7e8cc63">Ptr</a>&lt; <a class="el" href="../../da/d62/classcv_1_1MinProblemSolver_1_1Function.html">Function</a> &gt; &amp;f)=0</td></tr>
<tr class="memdesc:a22632a6392d2e159a8e01c2ed697cbe0 inherit pub_methods_classcv_1_1MinProblemSolver"><td class="mdescLeft">&#160;</td><td class="mdescRight">Setter for the optimized function.  <a href="../../df/d11/classcv_1_1MinProblemSolver.html#a22632a6392d2e159a8e01c2ed697cbe0">More...</a><br /></td></tr>
<tr class="separator:a22632a6392d2e159a8e01c2ed697cbe0 inherit pub_methods_classcv_1_1MinProblemSolver"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:aad56ae718e6cde978cac28e6ae1d58e7 inherit pub_methods_classcv_1_1MinProblemSolver"><td class="memItemLeft" align="right" valign="top">virtual void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="../../df/d11/classcv_1_1MinProblemSolver.html#aad56ae718e6cde978cac28e6ae1d58e7">setTermCriteria</a> (const <a class="el" href="../../d9/d5d/classcv_1_1TermCriteria.html">TermCriteria</a> &amp;termcrit)=0</td></tr>
<tr class="memdesc:aad56ae718e6cde978cac28e6ae1d58e7 inherit pub_methods_classcv_1_1MinProblemSolver"><td class="mdescLeft">&#160;</td><td class="mdescRight">Set terminal criteria for solver.  <a href="../../df/d11/classcv_1_1MinProblemSolver.html#aad56ae718e6cde978cac28e6ae1d58e7">More...</a><br /></td></tr>
<tr class="separator:aad56ae718e6cde978cac28e6ae1d58e7 inherit pub_methods_classcv_1_1MinProblemSolver"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="inherit_header pub_methods_classcv_1_1Algorithm"><td colspan="2" onclick="javascript:toggleInherit('pub_methods_classcv_1_1Algorithm')"><img src="../../closed.png" alt="-"/>&#160;Public Member Functions inherited from <a class="el" href="../../d3/d46/classcv_1_1Algorithm.html">cv::Algorithm</a></td></tr>
<tr class="memitem:a827c8b2781ed17574805f373e6054ff1 inherit pub_methods_classcv_1_1Algorithm"><td class="memItemLeft" align="right" valign="top">&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="../../d3/d46/classcv_1_1Algorithm.html#a827c8b2781ed17574805f373e6054ff1">Algorithm</a> ()</td></tr>
<tr class="separator:a827c8b2781ed17574805f373e6054ff1 inherit pub_methods_classcv_1_1Algorithm"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a8ae826127fa0f1f8d10a24841bd376f8 inherit pub_methods_classcv_1_1Algorithm"><td class="memItemLeft" align="right" valign="top">virtual&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="../../d3/d46/classcv_1_1Algorithm.html#a8ae826127fa0f1f8d10a24841bd376f8">~Algorithm</a> ()</td></tr>
<tr class="separator:a8ae826127fa0f1f8d10a24841bd376f8 inherit pub_methods_classcv_1_1Algorithm"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:aec9c965448e4dc851d7cacd3abd84cd1 inherit pub_methods_classcv_1_1Algorithm"><td class="memItemLeft" align="right" valign="top">virtual void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="../../d3/d46/classcv_1_1Algorithm.html#aec9c965448e4dc851d7cacd3abd84cd1">clear</a> ()</td></tr>
<tr class="memdesc:aec9c965448e4dc851d7cacd3abd84cd1 inherit pub_methods_classcv_1_1Algorithm"><td class="mdescLeft">&#160;</td><td class="mdescRight">Clears the algorithm state.  <a href="../../d3/d46/classcv_1_1Algorithm.html#aec9c965448e4dc851d7cacd3abd84cd1">More...</a><br /></td></tr>
<tr class="separator:aec9c965448e4dc851d7cacd3abd84cd1 inherit pub_methods_classcv_1_1Algorithm"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:ab6a18f1825475643e94381697d413972 inherit pub_methods_classcv_1_1Algorithm"><td class="memItemLeft" align="right" valign="top">virtual bool&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="../../d3/d46/classcv_1_1Algorithm.html#ab6a18f1825475643e94381697d413972">empty</a> () const</td></tr>
<tr class="memdesc:ab6a18f1825475643e94381697d413972 inherit pub_methods_classcv_1_1Algorithm"><td class="mdescLeft">&#160;</td><td class="mdescRight">Returns true if the <a class="el" href="../../d3/d46/classcv_1_1Algorithm.html" title="This is a base class for all more or less complex algorithms in OpenCV. ">Algorithm</a> is empty (e.g. in the very beginning or after unsuccessful read.  <a href="../../d3/d46/classcv_1_1Algorithm.html#ab6a18f1825475643e94381697d413972">More...</a><br /></td></tr>
<tr class="separator:ab6a18f1825475643e94381697d413972 inherit pub_methods_classcv_1_1Algorithm"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a286fc82744ccab3d248aca44524266a9 inherit pub_methods_classcv_1_1Algorithm"><td class="memItemLeft" align="right" valign="top">virtual <a class="el" href="../../dc/d84/group__core__basic.html#ga1f6634802eeadfd7245bc75cf3e216c2">String</a>&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="../../d3/d46/classcv_1_1Algorithm.html#a286fc82744ccab3d248aca44524266a9">getDefaultName</a> () const</td></tr>
<tr class="separator:a286fc82744ccab3d248aca44524266a9 inherit pub_methods_classcv_1_1Algorithm"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:aef2ad3f4145bd6e8c3664eb1c4b5e1e6 inherit pub_methods_classcv_1_1Algorithm"><td class="memItemLeft" align="right" valign="top">virtual void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="../../d3/d46/classcv_1_1Algorithm.html#aef2ad3f4145bd6e8c3664eb1c4b5e1e6">read</a> (const <a class="el" href="../../de/dd9/classcv_1_1FileNode.html">FileNode</a> &amp;fn)</td></tr>
<tr class="memdesc:aef2ad3f4145bd6e8c3664eb1c4b5e1e6 inherit pub_methods_classcv_1_1Algorithm"><td class="mdescLeft">&#160;</td><td class="mdescRight">Reads algorithm parameters from a file storage.  <a href="../../d3/d46/classcv_1_1Algorithm.html#aef2ad3f4145bd6e8c3664eb1c4b5e1e6">More...</a><br /></td></tr>
<tr class="separator:aef2ad3f4145bd6e8c3664eb1c4b5e1e6 inherit pub_methods_classcv_1_1Algorithm"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a0a880744bc4e3f45711444571df47d67 inherit pub_methods_classcv_1_1Algorithm"><td class="memItemLeft" align="right" valign="top">virtual void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="../../d3/d46/classcv_1_1Algorithm.html#a0a880744bc4e3f45711444571df47d67">save</a> (const <a class="el" href="../../dc/d84/group__core__basic.html#ga1f6634802eeadfd7245bc75cf3e216c2">String</a> &amp;filename) const</td></tr>
<tr class="separator:a0a880744bc4e3f45711444571df47d67 inherit pub_methods_classcv_1_1Algorithm"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a1f8ad7b8add515077367fb9949a174d2 inherit pub_methods_classcv_1_1Algorithm"><td class="memItemLeft" align="right" valign="top">virtual void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="../../d3/d46/classcv_1_1Algorithm.html#a1f8ad7b8add515077367fb9949a174d2">write</a> (<a class="el" href="../../da/d56/classcv_1_1FileStorage.html">FileStorage</a> &amp;fs) const</td></tr>
<tr class="memdesc:a1f8ad7b8add515077367fb9949a174d2 inherit pub_methods_classcv_1_1Algorithm"><td class="mdescLeft">&#160;</td><td class="mdescRight">Stores algorithm parameters in a file storage.  <a href="../../d3/d46/classcv_1_1Algorithm.html#a1f8ad7b8add515077367fb9949a174d2">More...</a><br /></td></tr>
<tr class="separator:a1f8ad7b8add515077367fb9949a174d2 inherit pub_methods_classcv_1_1Algorithm"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a763a62d1b03042eef7d7fc3ac6c87c79 inherit pub_methods_classcv_1_1Algorithm"><td class="memItemLeft" align="right" valign="top">void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="../../d3/d46/classcv_1_1Algorithm.html#a763a62d1b03042eef7d7fc3ac6c87c79">write</a> (const <a class="el" href="../../dc/d84/group__core__basic.html#ga6395ca871a678020c4a31fadf7e8cc63">Ptr</a>&lt; <a class="el" href="../../da/d56/classcv_1_1FileStorage.html">FileStorage</a> &gt; &amp;fs, const <a class="el" href="../../dc/d84/group__core__basic.html#ga1f6634802eeadfd7245bc75cf3e216c2">String</a> &amp;name=<a class="el" href="../../dc/d84/group__core__basic.html#ga1f6634802eeadfd7245bc75cf3e216c2">String</a>()) const</td></tr>
<tr class="memdesc:a763a62d1b03042eef7d7fc3ac6c87c79 inherit pub_methods_classcv_1_1Algorithm"><td class="mdescLeft">&#160;</td><td class="mdescRight">simplified API for language bindings This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.  <a href="../../d3/d46/classcv_1_1Algorithm.html#a763a62d1b03042eef7d7fc3ac6c87c79">More...</a><br /></td></tr>
<tr class="separator:a763a62d1b03042eef7d7fc3ac6c87c79 inherit pub_methods_classcv_1_1Algorithm"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="inherit_header pro_methods_classcv_1_1Algorithm"><td colspan="2" onclick="javascript:toggleInherit('pro_methods_classcv_1_1Algorithm')"><img src="../../closed.png" alt="-"/>&#160;Protected Member Functions inherited from <a class="el" href="../../d3/d46/classcv_1_1Algorithm.html">cv::Algorithm</a></td></tr>
<tr class="memitem:a68eeca71617474ad3d4561786f0289d2 inherit pro_methods_classcv_1_1Algorithm"><td class="memItemLeft" align="right" valign="top">void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="../../d3/d46/classcv_1_1Algorithm.html#a68eeca71617474ad3d4561786f0289d2">writeFormat</a> (<a class="el" href="../../da/d56/classcv_1_1FileStorage.html">FileStorage</a> &amp;fs) const</td></tr>
<tr class="separator:a68eeca71617474ad3d4561786f0289d2 inherit pro_methods_classcv_1_1Algorithm"><td class="memSeparator" colspan="2">&#160;</td></tr>
</table>
<a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
<div class="textblock"><p>This class is used to perform the non-linear non-constrained minimization of a function with known gradient,. </p>
<p>defined on an <em>n</em>-dimensional Euclidean space, using the <b>Nonlinear Conjugate Gradient method</b>. The implementation was done based on the beautifully clear explanatory article [An Introduction to the Conjugate Gradient Method Without the Agonizing Pain](<a href="http://www.cs.cmu.edu/~quake-papers/painless-conjugate-gradient.pdf">http://www.cs.cmu.edu/~quake-papers/painless-conjugate-gradient.pdf</a>) by Jonathan Richard Shewchuk. The method can be seen as an adaptation of a standard Conjugate Gradient method (see, for example <a href="http://en.wikipedia.org/wiki/Conjugate_gradient_method">http://en.wikipedia.org/wiki/Conjugate_gradient_method</a>) for numerically solving the systems of linear equations.</p>
<p>It should be noted, that this method, although deterministic, is rather a heuristic method and therefore may converge to a local minima, not necessary a global one. What is even more disastrous, most of its behaviour is ruled by gradient, therefore it essentially cannot distinguish between local minima and maxima. Therefore, if it starts sufficiently near to the local maximum, it may converge to it. Another obvious restriction is that it should be possible to compute the gradient of a function at any point, thus it is preferable to have analytic expression for gradient and computational burden should be born by the user.</p>
<p>The latter responsibility is accomplished via the getGradient method of a <a class="el" href="../../da/d62/classcv_1_1MinProblemSolver_1_1Function.html" title="Represents function being optimized. ">MinProblemSolver::Function</a> interface (which represents function being optimized). This method takes point a point in <em>n</em>-dimensional space (first argument represents the array of coordinates of that point) and compute its gradient (it should be stored in the second argument as an array).</p>
<dl class="section note"><dt>Note</dt><dd>class <a class="el" href="../../d0/d21/classcv_1_1ConjGradSolver.html" title="This class is used to perform the non-linear non-constrained minimization of a function with known gr...">ConjGradSolver</a> thus does not add any new methods to the basic <a class="el" href="../../df/d11/classcv_1_1MinProblemSolver.html" title="Basic interface for all solvers. ">MinProblemSolver</a> interface.</dd>
<dd>
term criteria should meet following condition: <div class="fragment"><div class="line">termcrit.type == (<a class="code" href="../../d9/d5d/classcv_1_1TermCriteria.html#a56fecdc291ccaba8aad27d67ccf72c57a56ca2bc5cd06345060a1c1c66a8fc06e">TermCriteria::MAX_ITER</a> + <a class="code" href="../../d9/d5d/classcv_1_1TermCriteria.html#a56fecdc291ccaba8aad27d67ccf72c57a857609e73e7028e638d2ea649f3b45d5">TermCriteria::EPS</a>) &amp;&amp; termcrit.epsilon &gt; 0 &amp;&amp; termcrit.maxCount &gt; 0</div><div class="line"><span class="comment">// or</span></div><div class="line">termcrit.type == <a class="code" href="../../d9/d5d/classcv_1_1TermCriteria.html#a56fecdc291ccaba8aad27d67ccf72c57a56ca2bc5cd06345060a1c1c66a8fc06e">TermCriteria::MAX_ITER</a>) &amp;&amp; termcrit.maxCount &gt; 0</div></div><!-- fragment --> </dd></dl>
</div><h2 class="groupheader">Member Function Documentation</h2>
<a id="ad64e8d003cc3a6682b4fa7ab18c0c0e9"></a>
<h2 class="memtitle"><span class="permalink"><a href="#ad64e8d003cc3a6682b4fa7ab18c0c0e9">&#9670;&nbsp;</a></span>create()</h2>

<div class="memitem">
<div class="memproto">
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          <td class="memname">static <a class="el" href="../../dc/d84/group__core__basic.html#ga6395ca871a678020c4a31fadf7e8cc63">Ptr</a>&lt;<a class="el" href="../../d0/d21/classcv_1_1ConjGradSolver.html">ConjGradSolver</a>&gt; cv::ConjGradSolver::create </td>
          <td>(</td>
          <td class="paramtype">const <a class="el" href="../../dc/d84/group__core__basic.html#ga6395ca871a678020c4a31fadf7e8cc63">Ptr</a>&lt; <a class="el" href="../../da/d62/classcv_1_1MinProblemSolver_1_1Function.html">MinProblemSolver::Function</a> &gt; &amp;&#160;</td>
          <td class="paramname"><em>f</em> = <code><a class="el" href="../../dc/d84/group__core__basic.html#ga6395ca871a678020c4a31fadf7e8cc63">Ptr</a>&lt;&#160;<a class="el" href="../../da/d62/classcv_1_1MinProblemSolver_1_1Function.html">ConjGradSolver::Function</a>&#160;&gt;()</code>, </td>
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          <td class="paramkey"></td>
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          <td class="paramtype"><a class="el" href="../../d9/d5d/classcv_1_1TermCriteria.html">TermCriteria</a>&#160;</td>
          <td class="paramname"><em>termcrit</em> = <code><a class="el" href="../../d9/d5d/classcv_1_1TermCriteria.html">TermCriteria</a>(<a class="el" href="../../d9/d5d/classcv_1_1TermCriteria.html#a56fecdc291ccaba8aad27d67ccf72c57a56ca2bc5cd06345060a1c1c66a8fc06e">TermCriteria::MAX_ITER</a>+<a class="el" href="../../d9/d5d/classcv_1_1TermCriteria.html#a56fecdc291ccaba8aad27d67ccf72c57a857609e73e7028e638d2ea649f3b45d5">TermCriteria::EPS</a>,&#160;5000,&#160;0.000001)</code>&#160;</td>
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          <td></td>
          <td>)</td>
          <td></td><td></td>
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<span class="mlabels"><span class="mlabel">static</span></span>  </td>
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<p>This function returns the reference to the ready-to-use <a class="el" href="../../d0/d21/classcv_1_1ConjGradSolver.html" title="This class is used to perform the non-linear non-constrained minimization of a function with known gr...">ConjGradSolver</a> object. </p>
<p>All the parameters are optional, so this procedure can be called even without parameters at all. In this case, the default values will be used. As default value for terminal criteria are the only sensible ones, <a class="el" href="../../df/d11/classcv_1_1MinProblemSolver.html#a22632a6392d2e159a8e01c2ed697cbe0" title="Setter for the optimized function. ">MinProblemSolver::setFunction()</a> should be called upon the obtained object, if the function was not given to <a class="el" href="../../d0/d21/classcv_1_1ConjGradSolver.html#ad64e8d003cc3a6682b4fa7ab18c0c0e9" title="This function returns the reference to the ready-to-use ConjGradSolver object. ">create()</a>. Otherwise, the two ways (submit it to <a class="el" href="../../d0/d21/classcv_1_1ConjGradSolver.html#ad64e8d003cc3a6682b4fa7ab18c0c0e9" title="This function returns the reference to the ready-to-use ConjGradSolver object. ">create()</a> or miss it out and call the <a class="el" href="../../df/d11/classcv_1_1MinProblemSolver.html#a22632a6392d2e159a8e01c2ed697cbe0" title="Setter for the optimized function. ">MinProblemSolver::setFunction()</a>) are absolutely equivalent (and will drop the same errors in the same way, should invalid input be detected). </p><dl class="params"><dt>Parameters</dt><dd>
  <table class="params">
    <tr><td class="paramname">f</td><td>Pointer to the function that will be minimized, similarly to the one you submit via <a class="el" href="../../df/d11/classcv_1_1MinProblemSolver.html#a22632a6392d2e159a8e01c2ed697cbe0" title="Setter for the optimized function. ">MinProblemSolver::setFunction</a>. </td></tr>
    <tr><td class="paramname">termcrit</td><td>Terminal criteria to the algorithm, similarly to the one you submit via <a class="el" href="../../df/d11/classcv_1_1MinProblemSolver.html#aad56ae718e6cde978cac28e6ae1d58e7" title="Set terminal criteria for solver. ">MinProblemSolver::setTermCriteria</a>. </td></tr>
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  </dd>
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</div>
</div>
<hr/>The documentation for this class was generated from the following file:<ul>
<li>opencv2/core/<a class="el" href="../../d3/d46/optim_8hpp.html">optim.hpp</a></li>
</ul>
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